Fixed Chooser_update to prevent problems with recursion which put program into endless-loop. Now clears variables that caused the update before calling the update_callback.
Fixed Chooser_update to prevent problems with recursion which put
program into endless-loop. Now clears variables that caused the update
before calling the update_callback.


git-svn-id: 4705079bc6b8aadf675e3696f5c015a6aa4916e3@128 3c1deb5b-d424-0410-962d-aba41a686d42

OpenCMISS/zinc,hsorby/zinc,hsorby/zinc,hsorby/zinc,OpenCMISS/zinc,OpenCMISS/zinc,OpenCMISS/zinc,hsorby/zinc